Official NHA Assessment

Race 6: DAMARA STAYERS CHALLENGE (Open to all horses)

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Line Horse
Coffeeberry
Reference for assessment
Exact Matches
0 / 4
Calculated = Official
Close Matches
0 / 4
Within 2 points
Significant Diffs
2 / 4
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Zazu                 6    51.0    1    0.00     0.0   73    74           74    +1
2    Coffeeberry          5    51.5    2    1.50     0.0   80    80           80    +0
3    Citrusdal            8    58.5    3    9.50     0.0   93    89           89    -4
99   Jaeger Moon          7    60.0    99   0.00     0.0   -     92           92    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zazu 73 71 74 -3 0.0 -
2 Coffeeberry Line 80 72 80 -8 0.0
3 Citrusdal 93 81 89 -8 0.0 -
99 Jaeger Moon - 97 92 +5 0.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points